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Latest posts from topic “Transitorio del primo ordine” Latest posts from topic “Transitorio del primo ordine” on “ElectroYou”. 2016-10-17T20:37:47Z https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227 Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674300 g.schgor 2016-10-18T15:13:42Z 2016-10-18T15:13:42Z
Scusa, ho ricontrollato l'andamento di [unparseable or potentially dangerous latex formula] per t>0:
tutto OK.
Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674298 pietro1990 2016-10-18T15:06:58Z 2016-10-18T15:06:58Z
In che senso la differenza?Nella condizione iniziale [unparseable or potentially dangerous latex formula] mi trovo come lei
Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674253 pietro1990 2016-10-18T10:05:59Z 2016-10-18T10:05:59Z
Si ha ragione mi scusi. Avrei quindi [unparseable or potentially dangerous latex formula]
Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674250 g.schgor 2016-10-18T09:52:37Z 2016-10-18T09:52:37Z
Nelle espressioni del fasore e del seno,
\varphi deve essere in radianti!
Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674243 pietro1990 2016-10-18T09:31:23Z 2016-10-18T09:31:23Z
Se intende numericamente ho considerato tutto in gradi, passando in radianti mi trovo -0,166. Oppure non è corretto lo svolgimento?
Re: Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674242 g.schgor 2016-10-18T09:25:15Z 2016-10-18T09:25:15Z
Non capisco come tu abbia calcolato l'angolo del fasore I_L.
(dovrebbe essere -0.166 rad. quindi con una differenza di \pi)
Transitorio del primo ordine https://www.electroyou.it/forum/viewtopic.php?f=2&t=66227#p674170 pietro1990 2016-10-17T20:37:47Z 2016-10-17T20:37:47Z
Salve, avrei bisogno di una mano con questo esercizio non se il procedimento che ho utilizzato è corretto.Determinare iL(t) per t<0 e t>0 , sapendo che l'interruttore si apre in t=0, R1=R2=5, R3=10, L=0,002H, J=30 A ,e(t)=220sin(314t)


Per t<0 ho applicato il principio di sovrapposizione degli effetto, iL(t)= iLe(t)+iLj(t)

Z1=Z2=5 ,Z3=10 ,ZL=jWL=0,628J. Posto Zs=Z2+Z3=15 ,ho calcolato [unparseable or potentially dangerous latex formula] = \frac {220}{5+0,626j} = 43,3-5,45j .A questo punto ho calcolato I_{L}=I1\cdot \frac {Z_S}{Z_L+Z_S} = [unparseable or potentially dangerous latex formula] = 43-7,2J = S=43,6 e^{-9,6J} ,da cui [unparseable or potentially dangerous latex formula]

Ho ricavato I_L=iJ\cdot \frac {R_3}{R_3+R_2} = 30\cdot \frac {10}{10+15} = 30 A . Per cui [unparseable or potentially dangerous latex formula], e la cond. inziale [unparseable or potentially dangerous latex formula].
Per t>0

Ho applicato Norton
Ricavando
R_N=R_1+R_2=15

I_2=J \cdot \frac {R_3}{R_3+R_2} =20A
Per cui [unparseable or potentially dangerous latex formula] , con [unparseable or potentially dangerous latex formula] e [unparseable or potentially dangerous latex formula] , con 7500=\frac {1} T_{au} .Posto [unparseable or potentially dangerous latex formula] , ho ricavato K=-7,3 da cui [unparseable or potentially dangerous latex formula] per t>0